<?php

/* SVN FILE: $Id$ */
/**
 * SassCommentNode class file.
 * @author      Chris Yates <chris.l.yates@gmail.com>
 * @copyright   Copyright (c) 2010 PBM Web Development
 * @license      http://phamlp.googlecode.com/files/license.txt
 * @package      PHamlP
 * @subpackage  Sass.tree
 */

/**
 * SassCommentNode class.
 * Represents a CSS comment.
 * @package      PHamlP
 * @subpackage  Sass.tree
 */
class SassCommentNode extends SassNode
{

    const NODE_IDENTIFIER = '/';
    const MATCH = '%^/\*\s*?(.*?)\s*?(\*/)?$%s';
    const COMMENT = 1;

    private $value;

    /**
     * SassCommentNode constructor.
     * @param object source token
     * @return CommentNode
     */
    public function __construct($token)
    {
        parent::__construct($token);
        preg_match(self::MATCH, $token->source, $matches);
        $this->value = $matches[self::COMMENT];
    }

    protected function getValue()
    {
        return $this->value;
    }

    /**
     * Parse this node.
     * @return array the parsed node - an empty array
     */
    public function parse($context)
    {
        return array($this);
    }

    /**
     * Render this node.
     * @return string the rendered node
     */
    public function render()
    {
        return $this->renderer->renderComment($this);
    }

    /**
     * Returns a value indicating if the token represents this type of node.
     * @param object token
     * @return boolean true if the token represents this type of node, false if not
     */
    public static function isa($token)
    {
        return $token->source[0] === self::NODE_IDENTIFIER;
    }

}
